Question 55 Answer and Explanation _ACT December 2014 Asia Form 65B Math Section

Question 55 Answer and Explanation _ACT December 2014 Asia Form 65B Math Section

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55. Whenever $\frac{2\sin{x}}{\sin{2x}}$ is defined, it is equivalent to which of the following expressions?

(Note: sin(2a) = 2(sin a)(cos a) for all real numbers a.)

A. 1

B. $\sin{x}$

C. $\cos{x}$

D. $\frac{1}{\sin{x}}$

E. $\frac{1}{\cos{x}}$

Answer and Explanation

Your Answer is

Correct Answer is E

Explanation